Fig. 1From: Exploring the contributions of two glutamate decarboxylase isozymes in Lactobacillus brevis to acid resistance and γ-aminobutyric acid productionGenetic organization of the glutamate decarboxylase gene clusters in eight selected genomes of LAB strains (not drawn to scale). a Neighbor-joining phylogenetic tree for these LAB species based on 16S rRNA gene sequence analysis. Bootstrap values are calculated from 1000 replications, and these values are shown at branch points (calculated by neighbor-joining, maximum likelihood and maximum parsimony methods). The bar represents 0.1 changes per nucleotide position. GenBank accession numbers are shown under the names of the strains. b Representation of gene loci encoding the proteins GadR, GadC and GadB in the eight strains. Numbers indicate protein identityBack to article page